Auto merge of #1519 - mikerite:job_unused_imports, r=alexcrichton
Auto merge of #1519 - mikerite:job_unused_imports, r=alexcrichton

Remove used imports

nodakai/rustup.rs,nodakai/rustup.rs,rust-lang/rustup,inejge/rustup.rs,inejge/rustup.rs,nodakai/rustup.rs,rust-lang/rustup,nodakai/rustup.rs,rust-lang/rustup,inejge/rustup.rs,inejge/rustup.rs,rust-lang/rustup,nodakai/rustup.rs,inejge/rustup.rs,rust-lang/rustup